The hormone that regulates calcium in the body is called parathyroid hormone (PTH). PTH is produced by the parathyroid glands, which are four small glands located in the neck near the thyroid gland.
PTH helps to regulate calcium levels in the blood by stimulating the release of calcium from the bones, increasing the absorption of calcium in the intestines, and reducing the amount of calcium excreted by the kidneys. PTH also helps to regulate the production of vitamin D, which is essential for calcium absorption in the intestines.
When blood calcium levels are too low, PTH is released, which helps to increase calcium levels back to normal. Conversely, when blood calcium levels are too high, the release of PTH is suppressed, which helps to lower calcium levels. This complex feedback system helps to ensure that calcium levels in the body remain within a normal range, which is essential for many physiological processes such as muscle and nerve function, bone health, and blood clotting.
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